The Research And Realization Of The Key Technologies In A Universal Handheld Terminal

In the current increasingly information-based society, as the close combination of computer technology and industry application, general computer systems are no longer the main characters in information industry, and embedded computer systems are becoming a rising star of the computer age. Embedded technology and handheld devices combine and expand to many new applications. This design developed a universal handheld terminal based on S3C2410A processor, and based on this implemented two key technologies: TFT-LCD display and PCMCIA/CF WLAN.This paper designed and implemented the universal handheld terminal hardware platform based on S3C2410A core board. The extended board designed by myself includes: 4-ch DC-DC, JTAG ICE, 3-ch UART, 10/100M Ethernet, LCD module, PCMCIA/CF, RTC and Reset, bus drivers and extensions, touch-screen circuit. At the same time, this platform supplies USB Host/Device, and SD card. All these make a good hardware support for handheld terminal.This paper analyzed SHARP LQ035Q7DH01 TFT-LCD Module and LCD controller embedded in S3C2410A processor in detail, designed a dedicated interface circuit. MAX II CPLD was used to adapt the timing interface and GPIOs were used to deal with the power supply sequence in TFT-LCD module. Analyzed Linux FrameBuffer operations in detail and on this basis completed LCD driver.This paper designed PCMCIA/CF hardware interface and explored it's Linux driver structures, and then implemented the PCMCIA/CF WLAN function in the terminal.The test showed that the terminal works correctly and stably. It has a certain theoretical and practical value.